JPH0541165Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric lock using an actuator, and particularly to a technique that can ensure locking when the door is closed.

[Conventional technology]

Electric locks that use an actuator such as a solenoid have the advantage of not requiring a key and that unlocking conditions can be easily changed. Furthermore, the location where the locking mechanism is provided and the operating section that unlocks the lock may be separated, and by inputting unlocking conditions into the operating section, the locked door can be opened even from a remote location. Can be done.

After the door is opened, some of these electric locks are in a locked standby state due to a lock instruction signal.
Some have a structure that automatically locks the door when you close it. However, with such electric locks, the timing of issuing a locking instruction after unlocking is a problem. For example, if a door can be opened at any time after an unlocking instruction is given, if the door does not open for some reason, the door can be opened at any time thereafter, which is inconvenient. Therefore, some devices allow the door to be opened for a preset period of time after issuing an unlocking instruction, and wait until this time has elapsed before issuing a locking instruction. By doing so, even if the door is not opened after the unlocking instruction, the door cannot be opened after a certain period of time, and the above-mentioned inconvenience is solved.

[Problem that the invention attempts to solve]

However, with the above electric lock, even after the door has been opened, if the door is closed within the above fixed time,
There is a drawback that the lock is not yet ready and cannot be locked.

The present invention aims to eliminate the above-mentioned drawbacks of the prior art, and aims to provide an electric lock that can reliably lock the door after it has been opened.

[Means for solving problems]

In order to achieve the above object, the present invention includes a hook provided on a door that is locked with a slight distance between it and the underframe, and a hook provided on the underframe into which the hook can be inserted. a latch having a concave groove, rotatably supported on a shaft and biased in the door opening direction by a latch spring, the hook fitting into the concave groove and rotating when the door is closed, and separated when the door is opened; When the door is closed, the above-mentioned latch is locked to a step provided near the tip to restrict rotation of the latch in the door opening direction, and when an unlocking instruction is received, it is possible to retreat, and when a locking instruction is received, it is possible to move forward. A latch stopper that releases the latch from the stepped portion by pushing the door toward the underframe; an actuator that moves the latch stop forward and backward; and a lock that locks after receiving an unlocking instruction signal and after a predetermined period of time has elapsed. It consists of a timer that issues an instruction signal, and a sensor that detects when the door is opened and issues a locking instruction signal.

[Effect]

The operation of the present invention will be explained.

When there is an instruction to unlock the lock mechanism (Fig. 1) in the locked state, the solenoid 11 which is the actuator
When the latch stopper 7 is energized and the suction element 9 is drawn into the solenoid, the latch stopper 7 becomes retractable. However, the step 7a at the tip of the latch stopper
The end of the latch 4 is engaged with the latch 4 to prevent the latch stopper 7 from retreating, so that the door is apparently closed (FIG. 2).

There is a slight gap S between the door 1 and the underframe 2 (Fig. 1a), and when the door 1 is pushed toward the underframe 2 by this distance, the latch 4 resists the latch spring 6. The latch 4 is removed from the stepped portion 7a at the tip of the latch stopper 7, and the latch stopper 7 is moved from the stopper spring 8.
The solenoid 11 is moved back by the stroke of the solenoid 11 (FIG. 3).

If the force pushing the door 1 is removed, the latch stopper 7
Since the latch 4 is retracted, the latch 4 is rotated by the latch spring 6, and the door 1 can be opened via the hook 3 with a single touch (FIG. 4).

When the door is opened, the sensor 13 detects it and issues a locking instruction. Even if the door cannot be opened, an unlock signal is issued and after a predetermined time elapses, a timer issues a locking instruction and the door is locked. After the door is opened, a locking instruction is issued from the sensor 13, the solenoid 11 is demagnetized, and the attractor 9 receives a force in the direction of being pushed out. but,
Since the latch stopper 7 comes into contact with the latch 4 and cannot return to its original position, the suction element 9 returns halfway and comes into pressure contact with the rear end of the latch stopper 7, becoming in a locked standby state (FIG. 5).

When the door 1 is closed, the hook 3 locks into the latch groove 4a.
When the latch 4 is rotated against the latch spring 6 until the door 1 comes into contact with the underframe 2, the latch 4 moves and the latch stopper 7 no longer contacts the latch. , is pushed by the spring 10 of the attractor 9 and moves forward to its original position.

When the force applied to the door is removed, the latch 4
is rotated in the door opening direction by the latch spring 6,
Immediately engage the stepped portion 7a of the latch stopper 7,
It stops rotating and becomes locked.

〔Example〕

Embodiments of the present invention will be described using the drawings. 6th
The figure is a perspective view showing an example in which the electric lock of the present invention is used in a locker equipped with a plurality of storage compartments. In the figure, there are a large number of doors 1, 1, . . . attached to each storage, and the locker body 2 is on the underframe side. There is an operating section 15 located slightly above the center of the lock car 2, and this operating section 15 is equipped with a numeric keypad 16 for inputting unlocking conditions for each storage, a keyhole 17 serving as an operation key, and various indicator lights 18. It is being

A computer that controls the lock system of this locker is installed inside the operating section 15.
FIG. 7 is a block diagram showing the configuration of the lock system, in which the computer 19 is the CPU and
It is composed of ROM and RAM, and a timer 20 is provided inside the CPU. The timer 20 receives a signal instructing to unlock, and then outputs a signal instructing to lock after a predetermined period of time has elapsed. Reference numeral 16 is a numeric keypad, 17 is an operation key, and 18 is an indicator light that gives instructions and warnings at each stage of the unlocking operation.
Reference numeral 11 is a solenoid that moves the suction element 9, which is an actuator, back and forth, and reference numeral 13 is a sensor that detects that the door is opened.

Figures 1a and 1b are diagrams showing the structure of an electric lock, and show the locked state. In the figure, a hook 3 is fixed to the door 1, and the door is closed with a distance S maintained between it and the underframe 2. A frame 12 is fixed to the underframe 2, and a latch 4 is rotatably supported on a latch shaft 5 fixed to the frame 12. The latch 4 has a groove 4a into which the hook 3 is inserted,
The door 1 is biased by the first spring 6 to rotate in the opening direction.

A rod-shaped latch stopper 7 is attached to the frame 12, and a groove 7a is formed as a step near the tip of the latch stopper 7, into which the latch 4 is fitted when the lock is locked, thereby restricting rotation of the latch 4. Note that the groove 7a may be formed as a protrusion. This latch stopper 7 is biased toward the rear end by a stopper spring 8.
The rear end portion of the solenoid 11 is in contact with the suction element 9 . The solenoid 11 is fixed to the frame 12 with a screw 14, and when excited, the solenoid 11 pulls the attractor 9 into the spring 1.
When attracted against zero and demagnetized, the attractor 9 projects outward by the spring 10.

Note that the suction element 9 may also be configured to serve as the latch stopper 7.

A sensor 13 is attached to the frame 12, and detects whether or not the door 1 is opened after an unlocking instruction is made by contacting and separating from the latch 4.

Figure 8 shows a flowchart for setting a password as an unlocking condition in the lock system shown in Figure 7, and Figure 9 shows a flowchart for unlocking and locking using a password. There is. In addition,
In the flowcharts of Figures 8 and 9,
#1, #2, . . . indicate processing procedure (step) numbers.

Regarding the setting of the PIN number, which is an unlocking condition, see Section 8.
This will be explained using figures. In step 1, insert the operation key of the computer 19 into the keyhole 17 and turn it on. In step 2, enter the door number of the storage compartment for which you want to set a PIN number, and make sure that the computer is able to write in the PIN number that corresponds to that door number.When this task is complete, turn off the operation key in step 3. do. The work up to this point is usually done by the Lotscar administrator.

In step 4, the user of the above-mentioned storage unit inputs his or her door number. In step 5, the computer checks whether the entered door number matches the number registered in step 2. If NO, the number is incorrect, so go back to step 1 and start over. If YES, proceed to step 6 and enter your password. The process waits for a decision as to whether or not to set the password entered in step 7. If YES, the process ends; if NO, the process returns to step 1 and starts over. The password is set by the above steps.

Next, the procedure for unlocking using a password will be explained using the flowchart shown in FIG. In step 11, the user enters his or her door number using the numeric keypad 16,
Next, in step 12, enter the password in the same way.
At step 13, the computer 19 determines whether the door numbers match or not. If NO, the process returns to step 11 and waits for the correct number to be input. YES
If so, proceed to step 14 and check whether the password matches the one set. If NO, the process returns to step 11; if YES, the process proceeds to step 15 and sends an unlock signal to the solenoid 11. In step 16, the sensor 13 detects whether the door has been opened, and if the door has been opened, a locking signal is sent to the solenoid in step 17, and the system waits for the door to be closed. If the door remains closed in step 16, proceed to step 18.
Then, the timer 20 waits for the set time, and when the timer 20 is up, it directly sends a locking signal to the solenoid.

The purpose for which the sensor 13 is used is as follows. If you do not use a sensor, for example 5
A solenoid suction time of seconds is set, and the door can be opened during that time. However, if an attempt is made to close the door within this 5 seconds, the latch stopper 7 and latch 4 will not be able to engage, and the door will not be locked. Therefore, a sensor is installed, and after the sensor confirms that the door has been opened, the solenoid is immediately set to the return state, so that the door can be locked even if it is closed within a set time.

Next, the opening/closing operation of the door will be explained. When an instruction is given to unlock the locked lock mechanism (Fig. 1) by entering a password into the operation unit, solenoid 1 is activated.
1 is energized, the suction element 9 is drawn into the solenoid, and the latch stopper 7 becomes retractable.
However, since the end of the latch 4 is fitted into the groove 7a at the tip and prevents the latch stopper 7 from moving backward, the door is apparently closed (FIG. 2).

There is a slight gap S between the door 1 and the underframe 2 (Fig. 1a), and when the door 1 is pushed toward the underframe 2 by this distance, the latch 4 resists the latch spring 6. The latch 4 is removed from the groove 7a at the tip of the latch stopper 7, and the latch stopper 7 is moved against the stopper spring 8.
The solenoid 11 is moved back by the stroke of the solenoid 11 (FIG. 3).

If the force pushing the door 1 is removed, the latch stopper 7
Since the latch 4 is retracted, the latch 4 is rotated by the latch spring 6, and the door 1 can be opened via the hook 3 with a single touch (FIG. 4).

A locking instruction is given in the following case; that is, a locking instruction is given even if the door is not opened when a predetermined period of time, for example, 5 seconds has elapsed after an unlocking instruction is issued by inputting a password. This predetermined time is measured by a timer 20. Furthermore, when the door is opened and detected by the sensor 13, a locking instruction is issued even if a predetermined time has not elapsed. When instructed to lock the door after opening,
The solenoid 11 is demagnetized, and the attractor 9 receives a force in a direction that pushes it out. However, since the latch stopper 7 cannot return to its original position after contacting the latch 4, the suction element 9 returns halfway and presses against the rear end of the latch stopper 7, waiting for the door to be closed. Figure 5).

When the door 1 is closed, the hook 3 locks into the latch groove 4a.
When the latch 4 is rotated against the latch spring 6 until the door 1 comes into contact with the underframe 2, the latch 4 moves and the latch stopper 7 no longer contacts the latch. , is pushed by the spring 10 of the attractor 9 and moves forward to its original position.

When the force applied to the door is removed, the latch 4
is rotated in the door opening direction by the latch spring 6,
It immediately fits into the groove 7a of the latch stopper 7, stopping rotation and becoming locked.

[Effect of idea]

As explained above, according to the present invention, in an electric lock using an actuator that locks when the door is closed after unlocking, a locking instruction signal is issued after a predetermined time has elapsed from the unlocking instruction signal. Since a timer and a sensor that detects the opening of the door and outputs a locking instruction signal are provided, the door can be reliably locked after an unlocking instruction is given.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an electric lock showing one embodiment of the present invention, in which a is a front view when the door is closed, and b is a
A sectional view taken from line A, Figure 2 is a diagram of the electric lock in Figure 1 with an unlock instruction given, a is a front view, b is a
Figure 3 is a cross-sectional view taken from line A-A of , and Figure 3 shows the state in which the door is pushed in when unlocking, a is a front view, and b is A of a.
- A sectional view taken from line A, Figure 4 shows the door when it is opened, a is a front view, b is a sectional view taken from line A-A of a, and Figure 5 shows the state in which the door is waiting to be locked. In the figure, a
is a front view, b is a cross-sectional view taken from line A-A in a, 6th
7 is a block diagram of the operating section, FIG. 8 is a flowchart for setting a password, and FIG. 9 is a flowchart for unlocking. 1...Door, 2...Underframe, 3...Hook, 4...
Latch, 6...Latch spring, 7...Latch stop, 7a...Step, 11...Solenoid, 13...
…sensor, 20…timer, S…〓between.

Claims (1)

[Claim for Utility Model Registration] A hook provided on the door that is locked with a slight distance between it and the underframe, and a groove provided in the underframe into which the hook can be inserted. The latch is rotatably supported on a shaft and biased in the door opening direction by a latch spring, and the hook fits into the groove when the door is closed and rotates, and is separated when the door is opened. The latch stopper is a latch stopper that locks the latch in the step provided thereon when the door is closed, restricts the rotation of the latch in the direction of opening the door, and allows the latch to move backward when receiving an unlocking instruction and to move forward when receiving a locking instruction. , an actuator that releases the lock between the step and the latch by pushing the door toward the underframe, an actuator that moves the latch stopper forward and backward, and a locking instruction signal that outputs a locking instruction signal after a predetermined period of time has elapsed after receiving the unlocking instruction signal. An electric lock characterized by consisting of a timer and a sensor that detects when a door is opened and issues a lock instruction signal.